MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Re: Output display of exponential function in Mathematica


Log[1/E^.5]
-0.5
Log[1/E^-.5] ? .5
True
Refine[1/E^x, 0<x<1]
E^-x
Or if you need to,
Refine[Log[1/E^x], 0<x<1]
-x
Kris
-------------- Original message -------------- 

> On Sun, 27 Nov 2005 08:24:53 +0000 (UTC), Bob Hanlon 
> wrote: 
> 
> >The output that you want is "unstable", i.e., Mathematica automatically 
> >converts it. 
> > 
> 
> Thanks. 
> 
> I have another question if you don't mind. 
> 
> I'm trying to just check and see if I got a whole bunch of 
> even-numbered study exercises right on exponents and natural logs. 
> The answers to the odds are in the book. 
> 
> As an example, LN(1/e^2) equals what? 
> 
> My answer is -1/2. 
> 
> In mathematica, I tried Simplify[LN(1/e^2)] and it just spit the same 
> thing out as the output. I also tried a couple of variations of 
> Solve[LN[1/e^2] = X] with essentially the same result 
> 
> How would you get Mathematica to verify that the answer is -1/2. 
> 
> Thanks a lot. 


  • Prev by Date: Re: Output display of exponential function in Mathematica
  • Next by Date: Re: Re: Output display of exponential function in Mathematica
  • Previous by thread: Re: Output display of exponential function in Mathematica
  • Next by thread: Re: Re: Output display of exponential function in Mathematica